Matches in SemOpenAlex for { <https://semopenalex.org/work/W2092315065> ?p ?o ?g. }
Showing items 1 to 78 of
78
with 100 items per page.
- W2092315065 endingPage "2346" @default.
- W2092315065 startingPage "2339" @default.
- W2092315065 abstract "The frequencies of anharmonic local modes in one-, two-, and three-dimensional lattices have been obtained analytically by combining the rotating-wave approximation with some of the formalism used previously to characterize defect modes in harmonic crystals. For weak anharmonicity these modes become delocalized, while they take on the vibrational pattern of a small molecule when the anharmonicity becomes large. The first-order corrections to the rotating-wave approximation are found to be small for any anharmonicity parameter, verifying that this approximate method of analysis can be used to separate the equations of motion. This identification of the weak-anharmonicity limit permits us for the first time to address the question of the existence of anharmonic local modes in real crystals. With anharmonic parameters similar to those found in alkali-metal halide crystals, the energy needed to produce these modes in all three dimensions is estimated. We find that thermal motion alone does not provide enough amplitude to support these modes in a lattice with the anharmonicity of pure LiF. On the other hand, at some defect sites the requirements could be less severe, and anharmonic modes might be generated by a nonthermal process such as an optical excitation of the F center, which introduces an energy equivalent of ensuremath{sim}40-Debye phonons into the lattice. The large anharmonicities found in solid He and near ferroelectric systems should provide more friendly environments for these modes." @default.
- W2092315065 created "2016-06-24" @default.
- W2092315065 creator A5056355788 @default.
- W2092315065 creator A5090219089 @default.
- W2092315065 date "1991-01-15" @default.
- W2092315065 modified "2023-09-25" @default.
- W2092315065 title "Intrinsic localized modes in a monatomic lattice with weakly anharmonic nearest-neighbor force constants" @default.
- W2092315065 cites W1967232532 @default.
- W2092315065 cites W2023468268 @default.
- W2092315065 cites W2050509115 @default.
- W2092315065 cites W2059684627 @default.
- W2092315065 cites W2061533142 @default.
- W2092315065 cites W2066688464 @default.
- W2092315065 cites W2069226173 @default.
- W2092315065 cites W2084016486 @default.
- W2092315065 cites W2085294512 @default.
- W2092315065 cites W2087137183 @default.
- W2092315065 cites W2108210777 @default.
- W2092315065 cites W3005574365 @default.
- W2092315065 doi "https://doi.org/10.1103/physrevb.43.2339" @default.
- W2092315065 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9997510" @default.
- W2092315065 hasPublicationYear "1991" @default.
- W2092315065 type Work @default.
- W2092315065 sameAs 2092315065 @default.
- W2092315065 citedByCount "83" @default.
- W2092315065 countsByYear W20923150652013 @default.
- W2092315065 countsByYear W20923150652014 @default.
- W2092315065 countsByYear W20923150652015 @default.
- W2092315065 countsByYear W20923150652016 @default.
- W2092315065 crossrefType "journal-article" @default.
- W2092315065 hasAuthorship W2092315065A5056355788 @default.
- W2092315065 hasAuthorship W2092315065A5090219089 @default.
- W2092315065 hasConcept C121332964 @default.
- W2092315065 hasConcept C147724859 @default.
- W2092315065 hasConcept C152149077 @default.
- W2092315065 hasConcept C180205008 @default.
- W2092315065 hasConcept C24123453 @default.
- W2092315065 hasConcept C24169881 @default.
- W2092315065 hasConcept C24890656 @default.
- W2092315065 hasConcept C26873012 @default.
- W2092315065 hasConcept C2781204021 @default.
- W2092315065 hasConcept C32909587 @default.
- W2092315065 hasConcept C62520636 @default.
- W2092315065 hasConcept C70050531 @default.
- W2092315065 hasConceptScore W2092315065C121332964 @default.
- W2092315065 hasConceptScore W2092315065C147724859 @default.
- W2092315065 hasConceptScore W2092315065C152149077 @default.
- W2092315065 hasConceptScore W2092315065C180205008 @default.
- W2092315065 hasConceptScore W2092315065C24123453 @default.
- W2092315065 hasConceptScore W2092315065C24169881 @default.
- W2092315065 hasConceptScore W2092315065C24890656 @default.
- W2092315065 hasConceptScore W2092315065C26873012 @default.
- W2092315065 hasConceptScore W2092315065C2781204021 @default.
- W2092315065 hasConceptScore W2092315065C32909587 @default.
- W2092315065 hasConceptScore W2092315065C62520636 @default.
- W2092315065 hasConceptScore W2092315065C70050531 @default.
- W2092315065 hasIssue "3" @default.
- W2092315065 hasLocation W20923150651 @default.
- W2092315065 hasLocation W20923150652 @default.
- W2092315065 hasOpenAccess W2092315065 @default.
- W2092315065 hasPrimaryLocation W20923150651 @default.
- W2092315065 hasRelatedWork W1861883752 @default.
- W2092315065 hasRelatedWork W2011537139 @default.
- W2092315065 hasRelatedWork W2023354006 @default.
- W2092315065 hasRelatedWork W2043986189 @default.
- W2092315065 hasRelatedWork W2068925411 @default.
- W2092315065 hasRelatedWork W2074899994 @default.
- W2092315065 hasRelatedWork W2092315065 @default.
- W2092315065 hasRelatedWork W2105213931 @default.
- W2092315065 hasRelatedWork W2519276115 @default.
- W2092315065 hasRelatedWork W2950276758 @default.
- W2092315065 hasVolume "43" @default.
- W2092315065 isParatext "false" @default.
- W2092315065 isRetracted "false" @default.
- W2092315065 magId "2092315065" @default.
- W2092315065 workType "article" @default.